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Old 16 September 2018, 10:07   #1
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Country: UK - England
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4M Humber Rib Project

Hey guys,
We are new to the RIB scene and decided to take a project on,

We are hoping to get the boat on the water in month

The boat has cost 325 so far

75 for boat
75 for Engine (Honda 15hp 4stroke) was spairs and repair but fixed it
175 for trailer

we are trying to do the whole project for under 500
(Fingers crossed)

Pictures added below
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Old 16 September 2018, 10:09   #2
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Old 16 September 2018, 10:53   #3
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Good luck with it, looks like the transom is shot, you planning to replace it?
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Old 16 September 2018, 11:25   #4
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Quote:
Originally Posted by dubrus View Post
Good luck with it, looks like the transom is shot, you planning to replace it?

i have reinforced the transom with fiberglass 12mm plate on both sides and covered with Chopped strand matt, i drilled 20mm down and the wood is still dry , i hope this is strong enough , its was damp near the top though
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Old 16 September 2018, 11:28   #5
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Good luck with it, looks like the transom is shot, you planning to replace it?

i also put 4 studs in to hold it all together!
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Old 16 September 2018, 11:28   #6
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Old 16 September 2018, 12:06   #7
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You appear to have glassed over dirty gel coat, pretty much a pointless exercise.

I appreciate you want to get on the water but this may not be the way to go about it.
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Old 16 September 2018, 12:11   #8
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You appear to have glassed over dirty gel coat, pretty much a pointless exercise.

I appreciate you want to get on the water but this may not be the way to go about it.

first time doing this type of thing :S , the lamination looks / feels solid, no air bubbles or lifting
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Old 16 September 2018, 12:37   #9
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Without getting into a long explanation that can easily be found on Google, it will depend on what type of fibreglass resin was used, most boats and most fibreglass repair kits contain polyester resin, and most gelcoat is the same.

Whilst it is good practice to grind the gelcoat off to get back to the bare fibreglass to get the best adhesion, you can get away with good surface prep if both surfaces are polyester based due to how polyester bonds. I would always grind gelcoat off personally though, especially on a transom.

It may be okay in your shed but when 50kg of outboard is bouncing about on an unprepped surface, who can say?

Just be careful and enjoy your new boat safely
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Old 16 September 2018, 16:03   #10
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RIBase
Quote:
Originally Posted by dubrus View Post
Without getting into a long explanation that can easily be found on Google, it will depend on what type of fibreglass resin was used, most boats and most fibreglass repair kits contain polyester resin, and most gelcoat is the same.

Whilst it is good practice to grind the gelcoat off to get back to the bare fibreglass to get the best adhesion, you can get away with good surface prep if both surfaces are polyester based due to how polyester bonds. I would always grind gelcoat off personally though, especially on a transom.

It may be okay in your shed but when 50kg of outboard is bouncing about on an unprepped surface, who can say?

Just be careful and enjoy your new boat safely
I ground the gelcoat off the deck on mines yesterday to get the new seats on half the street has a coating of yellow now used a 40 grit flap disc to get quite good results
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